Improved tuyere



@will @lilium B. K. TAYLOR, or HARRISBURG.' PENNSYLVANIA.

. Letters .Pa-tent No. 94,147, dated August 24, 1869.

rlvrraovru)A TUYERE.

, The Schedule referred to in these Letters Patent and making part of the same.

To all whom 'it ma/y concern Be it known that I, B. K. TAYLOR, ofHarrisburg, inthe county of Dauphin, and State of'. Pennsylvania, have invented a new and useful Improvement in Tuyeres; and I do hereby declare that the following is a full, clear, and exact description thereof', reference being bad'to the accompanying drawings, making 'part of this specification, and to the letters of reference marked thereon.

The nature of my invention consists- First, in bringing theblast of air from thebellowsy or blower in contact with the lire at a point above the forge-plate, insteadof immediately on the plate.

Second, in regulating the force 'and velocity of the blast to any desired degree, atjthe pleasure ofthe operator. l i

Third, in adjusting the tuyere and the height of the bellows to each other.

A represents the shell, which may be of lany suitable form, provided with a removable top plate, B, in the centre of which is an opening, the sides of which are tapering, so that the opening is smaller at the top than at the bottom.

C is a shaft, onY thenpper portion of which is a screw-thread, which engages with a cross-bar, c, placed across the inside of the shell. A

On the upper end of the shaft C is a tapering plug, D, which is iirst formed into a frustum of a cone somewhat smaller than the tapering hole in the top plate B,

` and then has three pieces ont out of its sides, forming three dat or concave,v surfaces, d, the greatest width of each being-equal to-about one-half the height of the plug D, and the greatest length equal to nearly one-third of its circumference;v so that when the plug D is placed in the tapering hole, there are three cavities between the dat or concave surfaces (l and the sides of the tapering hole in the top plate.

Between the flat or concave surfaces of the plug D are ribs, d', which may be cast or formed withA the plug', or attached to it afterward. Their angle of inclination is the same as thatof the tapering hole in the 'top plate, so that when the plug D is in the hole,

the ribs d form three channels for the air to pass through.

At the lower end of the shaft Gis a pinion, E, which .engages with a worm, F, on a horizontal shaft, G, which is provided with a crank, g, or other suitable means for turning it.

At the bottom of the shell A is an aperture, whichy corresponding with the size of the nozzle, placed one above another, and provided with plugs J, for closing them. A The operation of my invention is as follows:

' The nozzle I is inserted in the opening best suited to the height of the bellows, and the remaining openings are closed by the plugs ofthe tapering hole, in three currents, concentrating f at a distance above the top plate, varying according to the angle of` inclination of the Isides ,of the tapering hole and of the conical or upper portion of the plug D.

The portions of the channels lying between the flat or concave surfaces d' and the lsides of the tapering hole, being larger than the portions above said' ilat or concave surfaces, the currents of air increase in velocity as they pass through said channels.

The force and velocity of the blast may be increasedor diminished by raising or lowering the plug D, which may be effected by turning the shaft G, when the wbrm F will engage with the pinion E and rotate the screw-shaft C to the right or left, thus widening or narrowing the channels between the ribs d'.

The force and velocity of the blast may be further diminished by opening thev door H, when a portion of l the air will escape through the aperture in the bottom of the shell.

By leaving the door H open, sufficient draught will be created to prevent the re from going ont when not in immediate use. f

The door H may also be opened in order toremove any. ashes vor cinders which may accumulate in the shell.

By rotating the plug D back and forward, the ribs d serve to clean the tapering hole injthe top plate B, and keep it free from clinker.

Among the advantages of my invention, it may be stated that in ordinary tuyeres, the blast comes in contact with the lire on the bottom plate of the forge, immediately over the mouth of the tuyere, which soon burns out said plate. and 'tuyere; while in my invention, the three currents of air 'concentrate at such a distance above the plate, that lWhile sueient fire is maintained a few inches above the plate, the plate itself is kept cold and prevented from burning out, the

air between said plate and the point of concentration being always cold.v

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is-

The plug D, provided with the at or concave sur- 'faoes d and ribs d', in combination with the plate B, when constructed yand operating as herein shown and described.

Witnesses: i G. A. O. SMITH, E. R. BROWN.

B. K. TAYLOR. 

